Pin-Hex Machine Security Screw

As the name states, this has an internal pin within the hexagonal socket which requires a special insert bit or key wrench to insert & remove. This reduces the risk of tampering by thieves or intruders undoing the screws. Due to its 2-way reusable fixing capability, this is a useful security screw where maintenance is required.


Unique internal pin system.

Re-usable. Useful for maintenance.

Requires special tools.

Increased security.

Suitable for medium torque applications.

Application: Window grills, light fixtures in trains and buses, electronic equipment, defence equipment, prisons, hospitals, public signs, control panels, security cameras. 

Material: Stainless Steel AISI 304.

Size Range: M3 to M10 up to 80mm length.

Head Styles:

Button Head/Truss Head/Dome Head B4K41 – For higher torque and clamping force.

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Countersunk (CSK) Head B4K42 – For Flush level fixing.

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